package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.formula.functions.T;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {


    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        log.info("密码比对：{}", password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工信息
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //进行属性值的拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置创造时间及修改时间
       /* employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/
        //设置创建人和修改人的id  从threadlocal中获取当前元的id
        /*Long id = BaseContext.getCurrentId();
        log.info("当前调用者的id为:{}", id);
        employee.setCreateUser(id);
        employee.setUpdateUser(id);*/
        //销毁threadlocal的值 避免内存泄漏
        //BaseContext.removeCurrentId();
       /* log.info("添加员工时线程名字为:{},{}",Thread.currentThread().getName(),Thread.currentThread().getId());
        log.info("添加员工时线程空间为:{}", BaseContext.threadLocal);*/
        //设置初始密码值
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //调用mapper层存储数据
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工的所有信息
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
        //用pagehelp开启分页查询
        PageHelper.startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize());
        //调用mapper层方法进行查询
        Page<Employee> page = employeeMapper.pageQuery(pageQueryDTO);
        log.info("分页后的集合为:{}", page.getResult());
        List<Employee> list = page.getResult();
        log.info("强转后的集合为:{}", list);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 员工账号状态修改 启用或者禁用
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrPost(Integer status, Long id) {
        //封装到实体类中  再传递到数据库
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }

    /**
     *根据id查询员工数据
     * @param id
     * @return
     */
    @Override
    public Employee getById(long id) {
       Employee employee =  employeeMapper.getById(id);
       //设置密码不可见
        employee.setPassword("****");
        return employee;
    }

    /**
     * 修改员工数据
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //拷贝员工信息到实体类中
       Employee employee = new Employee();
       BeanUtils.copyProperties(employeeDTO,employee);

       //设置修改时间和修改人
      /* employee.setUpdateTime(LocalDateTime.now());
       employee.setCreateUser(BaseContext.getCurrentId());
        log.info("修改员工时线程名字为:{},{}",Thread.currentThread().getName(),Thread.currentThread().getId());
        log.info("修改员工时线程空间为:{}", BaseContext.threadLocal);*/

        employeeMapper.update(employee);
    }
}
